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Worksheets

Equilibra

Total questions: 20

Worksheet time: 37mins

Name
Class
Date
1.
Le Chaltelier's Principle states that if a chemical system at equilibrium is stressed,
a)
the system will adjust to increase the stress
b)
the system will adjust to reduce the stress
c)
the system will not adjust
2.

What is Le Chatelier’s Principle?

a)

Le Chatelier’s Principle states that if a system at equilibrium is subjected to a change (such as temperature, pressure, or concentration), the system will adjust itself to counteract that change and restore equilibrium.

b)

Le Chatelier’s Principle states that if a system at equilibrium is subjected to a change (such as temperature, pressure, or concentration), the system will NOT counteract the change.

3.

2SO2(g) + O2(g) ⇌ 2SO3(g) + exothermic


Removing O2(g) will

a)

shift equilibrium right

b)

shift equilibrium left

c)

increase pressure

d)

have no change

4.

2SO2(g)+O2(g) ⇌ 2SO3(g) + Exothermic


Adding SO3(g) will

a)

shift equilibrium right

b)

shift equilibrium left

c)

increase K

d)

have no change

5.

2SO2(g)+O2(g) ⇌ 2SO3(g) exothermic


Increasing the temperature will...

a)

shift equilibrium right

b)

shift equilibrium left

c)

reduce pressure

d)

have no change

6.
Equilibrium for 2CrO42- + 2H+ → Cr2O72- + H2O. What happen when H+ ion are added to the system?
a)
Position of equilibrium will shift to left
b)
Color of system will turn from orange to yellow
c)
Kc will be higher
d)
Equilibrium will shift to right to decrease the added H+ ion
7.
For CoCI42- +6H2O →Co(H2O)62+ + 4CI-. What happen when CI- ions are added?
a)
Position of equilibrium will shift to right
b)
Color of system will turn from blue to pink
c)
Concentration of reactants and products remain unchanged
d)
Equilibrium shift to left to reduce the added CI- ions
8.
For CoCI42- +6H2O →Co(H2O)62+ + 4CI-. What happen when H2O ions are added?
a)
Position of equilibrium will shift to left
b)
Color of system will turn from blue to pink
c)
Kc will change and increase as H2O is added
d)
Equilibrium shift to left to reduce the added H2O
9.

What happens to the equilibrium if we add methane (CH4)?

a)

It shifts left, towards the reactants

b)

It shifts right, towards the products

c)

It does not shift

10.

What happens to the equilibrium if we remove water (H2O)?

a)

It shifts left, towards the reactants

b)

It shifts right, towards the products

c)

It does not shift

11.

What happens to the equilibrium if we add hydrogen (H2)?

a)

It shifts left, towards the reactants

b)

It shifts right, towards the products

c)

It does not shift

12.

What happens to the equilibrium if we remove carbon monoxide (CO)?

a)

It shifts left, towards the reactants

b)

It shifts right, towards the products

c)

It does not shift

13.

What happens when sodium ions (Na+) are added?

a)

The reaction shifts left, towards the reactants

b)

The reaction shifts right, towards the products

c)

There is no shift

14.

What happens when fluoride ions (Na+) are removed?

a)

The reaction shifts left, towards the reactants

b)

The reaction shifts right, towards the products

c)

There is no shift

15.

2SO2(g) + O2(g) ⇌ 2SO3(g) + Heat


Removing O2(g) will

a)

shift equilibrium right

b)

shift equilibrium left

c)

increase pressure

d)

have no change

16.

2SO2(g)+1O2(g) ⇌ 2SO3(g) + Heat


Increasing the volume of the container will...

a)

shift equilibrium right

b)

shift equilibrium left

c)

slow rate of reaction

d)

have no change

17.

2SO2(g) + O2(g) ⇌ 2SO3(g) + Heat


Removing O2(g) will

a)

shift equilibrium right

b)

shift equilibrium left

c)

increase pressure

d)

have no change

18.

What happed to the position of equilibrium when the concentration Br2 increase?

a)

forward reaction

b)

reversed reaction

c)

remain unchanged

19.
For the reaction...
SO2(g) + O2(g) <−>  SO3(g)
If the concentration of 
SO2(g)  is increased, the equilibrium of the reaction will ___________.
a)
shift to the left
b)
shift to the right
c)
not shift
20.
For the reaction...
SO2(g) + O2(g) <−>  SO3(g)

If the equilibrium shifts to the right, the concentration of O2(g) will ___________.
a)
increase
b)
decrease
c)
remain the same